RE: XP 1500 When I add water to the Expresso side, it comes out as only half the amount that I put in. I tried cleaning it, to no avail. But, I think I am losing steam from the top. (Cupboard over it is all wet). I noticed the screw on cap seems to have a plug and a screw in the center that fall out . Could this be the problem? VANABOY@COMCAST.NET